PSU: the HX650 is not worth the money
Case: check the Enermax Hoplite also @ 60$
Motherboard: it uses the H67 chipset which will not allow for overclocking which in turn makes the 2600K pointless.. you need a P67 or Z68 motherboard.
VGA: again, you can do better with 320$
CPU: at best, the 2600K is marginally better than 2500K at gaming, so there's really no point in spending the additional 100$
Memory: Patriot Sector 5 is massively discounted at newegg atm, will land you better value.

Also, you want an SSD

__________________"Sometimes a cigar is just a cigar" - Unknown (but sometimes attributed to Sigmund Freud)

Skip the Lycosa. It's a piece of crap. They retail at $80? I picked one up at a thrift store for under $10 and I still feel like I was ripped off. It has all the build quality of a house built out of crackers and cheeze whiz, the keys feel like crap, the shiny plastic smears and looks like crap, the rubber coating on the keys wears off and where it doesn't it attracts hair and dust so either way it looks like crap...

$80 can buy you an entry level mechanical keyboard. Go for that instead, or go for a keyboard that has more features than the Lycosa at a lower price point, like the I-Rocks KR-6820E.

If you're really set on a Lycosa I'll sell you my thrift store one for $35.

I'd go with Sin's build, the 2600k is pretty much pointless for gaming, it does no better than the 2500k.
Add in a decently large HDD, something like a WD Caviar Blue, or Samsung Spinpoint, and you're golden. You don't need speed, that's what the SSD is for, this is for storage.